Fetch and store access_ and refresh_token [#35]
Refresh expired access_tokens [#35]

Note that in order to have @fresh_access_token set before rendering
starts, current_user needs to be a before_filter. You might think that
it's sufficient to have it called implicitly when the templates check
user_logged_in?, but apparently not--looks like template ivars are set
once at the start of rendering and not updated live.
Move token acquisition logic into the User class
Extract some duplicated code
Explicit var declaration

oops!
Merge branch 'master' into refresh-tokens
Explain why I did something strange [#35]
Have memcached available on production
Cache user lookup in Memcached [#11]
Merge pull request #42 from AndrewLorente/refresh-tokens

Refresh expired Capture access_tokens